CVE-2026-45994

Kernel memory disclosure via unchecked command lengths

Published May 27, 2026 · Updated May 27, 2026

Out-of-bounds reads in the Linux Kernel ibmasm driver allow local users to disclose kernel heap memory through crafted dot commands. command_file_write allocates count bytes but trusts independent command_size and data_size fields, so get_dot_command_timeout and memcpy_toio read beyond the allocation. Exploitation requires low-privilege local access to the ibmasm command interface; it can disclose kernel heap data to the service processor and interrupt availability, without reported integrity impact.

CVSS severity7.1
High
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds reads in the Linux Kernel ibmasm driver allow local users to disclose kernel heap memory through crafted dot commands. command_file_write allocates count bytes but trusts independent command_size and data_size fields, so get_dot_command_timeout and memcpy_toio read beyond the allocation. Exploitation requires low-privilege local access to the ibmasm command interface; it can disclose kernel heap data to the service processor and interrupt availability, without reported integrity impact.

The record

CVE
CVE-2026-45994
Published
May 27, 2026
Updated
May 27, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-125
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 27, 2026CVE publishedPublication date reported by the CVE source.
  2. May 27, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <0eb09f737428e482a32a2e31e5e223f2b35a71d3
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <a672682d39dd34e2b5ba4feb436723bed65125ff
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <aefc1a97da17d8309974690c8a03e439a91ebb1c
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d0fb4d1dc43f8d5179917a2daaa82680993d4cdf
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ee5737891464030a189837467df3b81a273718ad
  6. Affected versionversion=2.6.12

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <0eb09f737428e482a32a2e31e5e223f2b35a71d3; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <a672682d39dd34e2b5ba4feb436723bed65125ff; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <aefc1a97da17d8309974690c8a03e439a91ebb1c; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d0fb4d1dc43f8d5179917a2daaa82680993d4cdf; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ee5737891464030a189837467df3b81a273718ad; version=2.6.12

Published CVSS scores

7.1NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
5.5Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
7.1Canonical UbuntuCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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